Extension:ArticleComments / messages missing for translation

At least the reasons for failure "Name field is required." and "Comment field is required." are not available for translation. Cheers

And where in the code are these texts observed?

Well I do not know. I tested this extension to be able to make a better translation. I you enter nothing and try to save the comment you get these hints. To me it makes sense to have them too. Cheers

I think you didn't take the following message into account: article-comments-required-field (""$1" field is required.").

Oops, your are right! The version provided there must show an earlier phase of development. Actually I should have realised this on my own. :-|